WO2020235414A1 - Sofa seat structure - Google Patents

Abstract

This sofa seat structure is provided with a seat main body (11, 41) and a ground contact part (14) which is provided at the bottom of the seat main body (11, 41) and which supports the seat main body (11, 41); the seat main body (11, 41) comprises a lower structure (111, 141) which configures the bottom part of the seat main body (11, 41) and is supported by the ground contact part (14), and an upper structure (112, 142) which is stacked on top of the lower structure (111, 141) and configures the top of the seat main body (11, 41), wherein the lower structure (111, 141) comprises a support member (15, 43) which supports the upper structure (112, 142) and an outer wall (16, 44) which covers the support member (15, 43), the outer wall (16, 44) being formed from a resin.

Description

Sofa seat structure

The present invention relates to a sofa seat structure.
The present application claims priority to Japanese Patent Application No. 2019-095401 filed on May 21, 2019, the contents of which are incorporated herein by reference.

Conventionally, the internal structure of a sofa has been constructed using a material made of wood or metal (for example, Patent Documents 1 to 3), and is individually processed and assembled into a desired design by a skilled craftsman. It was made by.

Japanese Patent Application Laid-Open No. 2018-68841 Japanese Patent Application Laid-Open No. 2016-67584 Japanese Patent Application Laid-Open No. 10-276861

In the conventional configuration, it is necessary to cover the epidermis so as to have a desired design while forming the internal structure required for strength from wood or metal members and ensuring the cushioning property required on the outside of the internal structure. .. For this reason, in the case of a sofa with a high design, skillful skill is required for manufacturing, and a lot of time and labor are required, which requires manufacturing time and manufacturing cost.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a sofa seat structure having both high design and productivity while suppressing manufacturing time and manufacturing cost.

The seat structure of the sofa according to the first aspect of the present invention includes a seat body and a ground contact portion provided at the lower end of the seat body and supporting the seat body, and the seat body is a lower portion of the seat body. The substructure is composed of a lower structure and is supported by the ground contact portion, and a superstructure which is laminated on the lower structure and constitutes the upper part of the seat body. It has a support member for supporting the support member and an outer shell covering the support member, and the outer shell is formed of a resin.

According to the seat structure of the sofa according to the first aspect of the present invention, the outer shape of the lower structure constituting the lower part of the seat body can be designed in various designs by using the outer shell formed of resin. .. In addition, by forming the outer shell with resin, it is possible to easily process designs that are difficult to process by hand, so even if the shape is highly designed, it will have the same quality without relying on skilled skills. Mass production is possible. As a result, labor can be reduced, and a sofa seat structure having both high design and productivity can be provided while shortening the manufacturing time and suppressing the manufacturing cost. Furthermore, because it is made of resin, the weight of the entire sofa can be reduced as compared with the case of using wood or metal, and it is easy to transport and rearrange the sofa.

In the seat structure of the sofa according to the second aspect of the present invention, in the first aspect, the height dimension of the outer shell is smaller in the center than on both outer sides in each of the width direction and the depth direction. ..

According to the seat structure of the sofa according to the second aspect of the present invention, since the thickness of the center of the seat body becomes thin, it is possible to give a neat appearance and produce a feeling of light weight by a visual effect. be able to.

In the first or second aspect, the seat structure of the sofa according to the third aspect of the present invention has the support member and the skin covering the outer shell, and the skin is fixed to the support member. ..

According to the seat structure of the sofa according to the third aspect of the present invention, the outer shell can be securely fixed to the support member by the skin. The outer shell only needs to be temporarily fixed to the support member, which facilitates the assembly work.

In the seat structure of the sofa according to the fourth aspect of the present invention, in any one of the first to third aspects, the outer shell includes a pair of first outer shells arranged on both sides in the width direction of the seat body and the said outer shell. It has a pair of second outer shells that are arranged without a gap between the pair of the first outer shells and that connect the pair of the first outer shells to each other.

According to the seat structure of the sofa according to the fourth aspect of the present invention, in a small sofa having a short width direction, only a pair of first outer shells need to be used, and a large sofa having a long width direction. Then, by arranging the pair of second outer shells between the pair of first outer shells, the length in the width direction can be adjusted.

According to the sofa seat structure according to the above aspect of the present invention, it is possible to provide a sofa seat structure having both high design and productivity while suppressing the manufacturing cost.

FIG. 1 is a front view showing the overall structure of the sofa according to the embodiment of the present invention. FIG. 2 is a perspective view showing the configuration of the lower structure of the sofa according to the embodiment of the present invention from below. FIG. 3A is a perspective view showing a first outer shell of a sofa according to an embodiment of the present invention. FIG. 3B is a side view (viewing in the Y direction) showing the first outer shell of the sofa according to the first embodiment of the present invention. FIG. 3C is a side view (viewing in the X direction) showing the first outer shell of the sofa according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing the configuration of the lower structure of the sofa according to the embodiment of the present invention. FIG. 5 is a partial cross-sectional view showing a connection structure between the seat body of the sofa and the backrest according to the first embodiment of the present invention. FIG. 6 is a front view showing the overall structure of the sofa according to the embodiment of the present invention. FIG. 7 is a view showing the structure of the lower structure of the sofa according to the embodiment of the present invention from below.

Hereinafter, embodiments of the sofa seat structure in the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to this embodiment.

In the following explanation, the person sitting on the back of the sofa with his back turned to the front is "front", the opposite side is "rear", and the upward direction is "up". The opposite direction is "down", the left is "left", and the right is "right". The left-right direction of the sofa is called the "width direction".

Further, in the drawings, the XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. In the XYZ coordinate system, the "X direction" is a direction parallel to the "width direction" of the sofa shown in FIG. The "Z direction" is a direction orthogonal to the X direction and is the "vertical direction" in FIG. The "Y direction" is defined as a "depth direction" orthogonal to both the X direction and the Z direction.

[First Embodiment]
FIG. 1 is a front view showing the overall structure of the sofa 100 of the first embodiment. FIG. 2 is a perspective view showing the configuration of the lower structure 111 from below. FIG. 3A is a perspective view showing the first outer shell 16A. FIG. 3B is a side view (viewing in the Y direction) showing the first outer shell 16A. FIG. 3C is a side view (viewing in the X direction) showing the first outer shell 16A. FIG. 4 is a cross-sectional view showing the configuration of the lower structure 111. FIG. 5 is a partial cross-sectional view showing a connection structure between the seat body 11 and the backrest 12.

As shown in FIG. 1, the sofa 100 of the present embodiment is, for example, a sofa for two people, and includes a seat body 11, a backrest 12, four legs 13, and four ground contact portions 14.
The seat body 11 is in a state in which the lower structure 111 constituting the lower part of the seat body 11, the upper structure 112 forming the upper part of the seat body 11, and the lower structure 111 and the upper structure 112 are vertically laminated. The first joining material 113, which is joined by, is provided. The seat body 11 is supported by four legs 13 extending upward, and is placed on the floor surface via a ground contact portion 14 provided at the lower end of each leg 13. The upper surface of the seat body 11, that is, the upper surface of the upper structure 112 is a seat surface 112a on which the user can sit.

The shape of the seat body 11 of the present embodiment in a top view is, for example, a rectangular shape.
The shape of the seat body 11 when viewed from above is not limited to a rectangular shape, and may be another shape such as an elliptical shape.

The backrest 12 is provided on the seat surface 112a of the seat body 11. The backrest 12 extends upward, and the lower end side of the backrest 12 is connected to the rear end side of the seat body 11 in the Y direction.

The backrest 12 has a substantially rectangular shape in front view, but is not limited to this, and may have another shape such as an elliptical shape. As shown in FIG. 1, the backrest 12 of the present embodiment has different length dimensions in the vertical direction in the vertical direction, is the longest on the lower end side, is substantially equal to the width direction length of the seat body 11, and goes upward. It is getting shorter according to.

Next, the specific structure of the sofa 100 in this embodiment will be described.

(Seat body)
As shown in FIG. 1, the seat body 11 of the sofa 100 of the present embodiment is composed of a lower structure 111 and an upper structure 112 laminated on the lower structure 111.

As shown in FIG. 2, the lower structure 111 includes a wooden support member 15, a resin outer shell 16, and a lower skin (skin) 17 (see FIG. 1) that covers the surfaces of the support member 15 and the outer shell 16. , Is equipped. The outer shell 16 is covered with the lower skin 17 while being arranged in a frame shape on the peripheral edge of the support member 15, and is fixed to the support member 15.

The support member 15 has a panel base material 15a having a rectangular plate shape in a plan view. R processing is applied to each of the four corners of the panel base material 15a. A panel support frame 18 extending downwardly perpendicular to the lower surface 15b is fixed to the lower surface 15b of the panel base material 15a inside the outer peripheral edge of the panel base material 15a.

Here, the peripheral edge of the support member 15 described above is a region including the outer peripheral edge of the panel base material 15a.

The panel support frame 18 has a pair of long side rods 181 arranged along the long sides of the panel base material 15a, a pair of short side rods 182 arranged along the short sides of the panel base material 15a, and corner positions. It is provided with four leg fixing frames 183 arranged in. The panel support frame 18 is fixed to the lower surface 15b of the panel base material 15a by using bolts, an adhesive or the like.

Each leg fixing frame 183 projects outward toward the four corners of the panel base material 15a, and the legs 13 are inserted into the inner insertion holes 18b. Each leg 13 is screwed into the prismatic leg fixing base 21 arranged inside the four corners of the panel support frame 18 via the leg fixing tool 19 in a state of being inserted into the insertion hole 18b of the leg fixing frame 183. It is stopped and fixed. The four legs 13 extending in the vertical direction do not extend vertically with respect to the panel base material 15a, but are inclined outward as they go downward. Examples of the constituent material of the leg 13 include a metal material, wood, a resin material, and the like.

On the lower surface 15b of the panel base material 15a, a pair of connecting rods 184 for connecting a pair of long side rods 181 and 181 facing each other in the depth direction are provided at positions inside the panel support frame 18. The connecting rods 184 are arranged at intervals in the width direction (X direction) and are fixed in an upright state with respect to the lower surface 15b of the panel base material 15a. These pair of connecting rods 184 suppress the downward bending of the central portion of the panel base material 15a.

The lower surface 15b of the panel base material 15a is provided with four reinforcing ribs 185 erected between the lower surface 15b of the panel base material 15a and the panel support frame 18 at positions outside the panel support frame 18. .. The reinforcing ribs 185 are located at the center of the long side rods 181 and 181 in the length direction and the center of the short side rods 182 and 182 in the length direction, and are perpendicular to the long side rods 181 and the short side rods 182. It is fixed to the lower surface 15b of the panel base material 15a in an upright state. These four reinforcing ribs 185 suppress the downward bending of the panel base material 15a, particularly the outer peripheral edge.

An outer shell 16 covering the support member 15 having such a configuration is arranged on the outer peripheral portion of the panel base material 15a on the lower surface 15b side. The outer shell 16 has a pair of first outer shells 16A and 16A, and are arranged side by side in the width direction (X direction) without any gap between them. These first outer shells 16A and 16A are provided so as to cover them from the outer peripheral edge of the panel base material 15a to the lower end edge of the panel support frame 18.

Specifically, the first outer shells 16A and 16A cover the lower end surface 18c of the panel support frame 18 from the outer peripheral surface 15c of the panel base material 15a, and include four reinforcing ribs 185 and a leg fixing frame 183 of the panel support frame 18. It is provided to hide.

As shown in FIG. 3A, each first outer shell 16A has a C-shaped upper outer circumference 16aa and a lower inner circumference 16bb in which one of the four sides of the quadrangle is open in a plan view. The first outer shell 16A has a cover shape in which the lower inner circumference 16bb is inserted inward from the upper outer circumference 16aa in a plan view as it goes downward. Further, the first outer shell 16A has a concave three-dimensional shape in which the upper outer circumference 16aa is located above the lower inner circumference 16bb in the side view.

The first outer shell 16A consists of three bottom plate portions 16c forming three C-shaped sides in a plan view, three walls 16d rising from the outside of each bottom plate portion 16c so as to form a curved surface, and adjacent walls 16d. It has a pair of corners 16e and a pair of corners 16e. The corner 16e has an R shape corresponding to the corner of the panel base material 15a.

Each corner 16e of the first outer shell 16A is formed with a notch recess 16f recessed from the lower inner circumference 16bb toward the outside. As shown in FIG. 2, when the first outer shell 16A is arranged at a predetermined position of the support member 15, the legs 13 mounted on the panel base material 15a are positioned in each notch recess 16f. To do.

In the present embodiment, each first outer shell 16A is a resin molded product. The first outer shell 16A is obtained, for example, by arranging a plate-shaped plastic material on a concave mold and vacuum forming it. The outer surface 16g of the first outer shell 16A has a curved surface that is generally rounded, and the first outer shell 16A having an arbitrary shape can be created by changing the mold.

In the present embodiment, as shown in FIGS. 3B and 3C, each first outer shell 16A has different height dimensions in the width direction (X direction) and the depth direction (Y direction).

As shown in FIG. 3B, in the width direction (X direction) of the first outer shell 16A, the height T2 of the end portion 162, which is an open end, is on the opposite side of the width direction from the end portion 162. It is smaller than the height T1 of the corner 16e located at, and satisfies the relationship of T1> T2.

As shown in FIG. 3C, in the first outer shell 16A, the height T3 of the central portion in the depth direction (Y direction) is smaller than the height T1 of the corner 16e, and the relationship of T1> T3 is satisfied. By forming such a three-dimensional shape, the strength of the first outer shell 16A is increased.

Such first outer shells 16A and 16A are positioned on both sides in the width direction with respect to the support member 15, and are arranged in a state where their ends 162 and 162 face each other in the width direction. For this reason, the outer shell 16 has a shape having the highest height dimension on both outer sides in both the width direction and the depth direction, and the lowest height dimension in the center in both the width direction and the depth direction. The space is wide.

The first outer shells 16A and 16A arranged in the width direction form a lower frame (outer shell 16) over the entire circumference of the lower structure 111. The first outer shells 16A and 16A arranged in the width direction have a shape continuous with each other. Therefore, the lower end side line (lower end side contour) in the outer shell 16 draws a continuous curve in the width direction.
The first outer shells 16A and 16A may be temporarily fixed to the support member 15 by using, for example, a tacker or an adhesive.

The lower skin 17 covers the support member 15 so that the outer shell 16 formed of the pair of first outer shells 16A and 16A is integrated with the support member 15. In the present embodiment, the lower epidermis 17 covers the entire outer surface 16 g of the outer shell 16. The upper peripheral edge 17b of the lower skin 17 is fixed to the upper peripheral edge of the panel base material 15a among the support members 15, and the lower peripheral edge 17a is fixed to the inside of the panel support frame 18 shown in FIG. The upper peripheral edge 17b and the lower peripheral edge 17a of the lower epidermis 17 are fixed to the support member 15 by using, for example, a tacker or an adhesive. The lower skin 17 is formed of an appropriate cushioning material such as urethane.

The lower peripheral edge 17a of the lower skin 17 is fixed to the inner surfaces 181a and 182a of the long side rod 181 and the short side rod 182 of the panel support frame 18 so as to cover at least a part thereof and is located at the four corners. The inner surface 21a of each leg fixing base 21 is covered and fixed. In FIG. 4, the entire upper surface 15d of the panel base material 15a is covered with the lower skin 17. However, the lower epidermis 17 of this region is hidden by the superstructure 112 placed on the panel substrate 15a. Therefore, the lower skin 17 may cover only the peripheral edge of the upper surface 15d of the panel base material 15a. In that case, the upper peripheral edge 17b of the lower skin 17 is fixed to the upper surface 15d of the panel base material 15a.

The upper structure 112 of the seat body 11 includes a panel base material 25, a cushion 26, and an upper skin (skin) 27. The panel base material 25 is a wooden plate material having a rectangular plate shape in a plan view, similarly to the panel base material 15a of the lower structure 111. On the rear side of the panel base material 25, a pair of joint convex portions 25A projecting upward are formed in the width direction. Each joint convex portion 25A is composed of a pair of side walls (not shown) that rise vertically from the panel base material 15a, and a joint plate 25b that connects the upper ends of the pair of side walls. The backrest 12 is joined to the pair of joint convex portions 25A (joining plate 25b).

The cushion 26 is arranged on the upper surface 25aa of the panel base material 25. The cushion 26 is formed of a material having appropriate cushioning properties, such as urethane.

The upper skin 27 is provided so as to integrally cover the panel base material 25 and the cushion 26. The upper skin 27 is formed of, for example, leather, cloth, a vinyl material, or the like, and may be the same material as the lower skin 17 described above, or may be a different material.

The above-mentioned lower structure 111 and upper structure 112 are joined to each other via a plurality of first joining members 113 as shown in FIG. 5 in a state of being attached to the skin, and are assembled as a seat body 11. The first joining material 113 may be a bolt and a nut as shown in FIG. 5, a screw (not shown), or an adhesive material.

(Back)
As shown in FIG. 5, the backrest 12 has an internal structure 31, a cushion 32, and a backrest skin 33. The internal structure 31 includes a rectangular upper plate (not shown), a rectangular front plate 31a provided on the front end side of the upper plate, and a front plate 31a provided on the rear end side of the upper plate in the depth direction (Y). A pair of side plates that simultaneously cover the rear plates 31b facing each other in the direction), the joining plates 31c that connect the lower ends of the front plates 31a and the rear plates 31b, and the side end faces on both sides in the width direction (X direction) of each of these members. (Not shown). The front plate 31a and the rear plate 31b are inclined at a predetermined angle so that the upper plate is located behind the joint plate 31c.

The cushion 32 is provided facing the front plate 31a and the rear plate 31b of the internal structure 31. The backrest skin 33 is provided so as to integrally cover the cushion 32 and the internal structure 31.

Such a backrest 12 has a pair of second joining members 121 and 121 (one of which is not shown) arranged at intervals in the width direction (X direction) in a state where the backrest 12 is attached to the backrest skin 33. It is joined to the seat body 11 via. In this way, the sofa 100 of this embodiment is assembled. Here, the second joining materials 121 and 121 may be bolts and nuts as shown in FIG. 5, screws (not shown), or adhesive materials.

The outer shape of the sofa 100 in this embodiment has no angular portion, and has a smooth curved shape as shown in FIG. This can be achieved by applying R processing to the key points of the internal structure.

By using the resin-molded outer shell 16 as in the present embodiment, the outer shape of the lower structure 111 constituting the seat body 11 can be designed with various designs. By molding the outer shell 16 with resin, it is possible to easily process a design that is difficult to process by hand. In the past, processing wood to achieve the desired design required skillful skills, which required time and effort.

On the other hand, by using a resin molded product for the outer shell 16 as in the present embodiment, mass production can be performed with the same quality even if the shape has a high design, without relying on skilled skills. As a result, labor can be reduced, manufacturing time can be shortened, and costs can be reduced. In this way, it is possible to provide the seat structure 110 of the sofa 100 which has both high design and productivity while suppressing the manufacturing cost. Here, the seat structure 110 means the seat body 11 of the sofa 100 and the structure below the seat body 11. That is, it means a structure including a seat body 11 of the sofa, four legs 13, and four grounding portions 14.

Furthermore, since the outer shell 16 made of resin is used, the weight of the entire sofa 100 can be reduced as compared with the case of using wood or metal, and the sofa 100 can be easily transported or rearranged.

Further, in the present embodiment, the height dimension of the outer shell 16 formed from the pair of first outer shells 16A and 16A is smaller in the center than on both outer sides in each of the width direction and the depth direction. Thereby, in the lower structure of the seat body 11, the thickness of the center of the seat body 11 can be reduced. As a result, the space under the seat is expanded, the feeling of oppression is small, and a sharp impression can be given. In addition, by making the appearance cleaner, it is possible to produce a feeling of lightness by a visual effect. Further, the strength of the first outer shells 16A and 16A and the outer shell 16 formed from the first outer shells 16A and 16A is increased.

In the present embodiment, the lower skin 17 covers the pair of first outer shells 16A, 16A so as to be integral with the support member 15, thereby supporting the outer shell 16 formed from these first outer shells 16A, 16A. It can be securely fixed to the member 15. Therefore, it is only necessary to temporarily fix the first outer shells 16A and 16A to the support member 15 with a tacker or an adhesive, and the assembly work becomes easy.

[Second Embodiment]
FIG. 6 is a front view showing the overall structure of the sofa 200 of the second embodiment. FIG. 7 is a view showing the configuration of the lower structure 141 of the sofa 200 of the second embodiment from below.

As shown in FIG. 6, the sofa 200 of the present embodiment is, for example, a sofa for three people, and includes a seat body 41, a backrest 42, four legs 13 and four ground contact portions 14. The configuration of the backrest 42 of the present embodiment is the same as the configuration of the backrest 12 of the first embodiment described above although the length in the width direction is different, and thus a specific description thereof will be omitted. Unless otherwise specified, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The seat body 41 includes a lower structure 141 and an upper structure 142, and a joining material (not shown) for joining them. Although the configuration of the superstructure 142 of the present embodiment has a different length in the width direction, it is the same as the configuration of the superstructure 112 of the first embodiment described above, and thus a specific description thereof will be omitted.

As shown in FIG. 7, the lower structure 141 includes a wooden support member 43, a resin outer shell 44, and a lower skin 45 (see FIG. 6) that covers the surfaces of the support member 43 and the outer shell 44. ing.

The support member 43 includes at least a panel base material 46 and a panel support frame 48 fixed to the lower surface 46b of the panel base material 46.

The outer shell 44 of the present embodiment is arranged between a pair of first outer shells 16A and 16A and a pair of first outer shells 16A and 16A, and a pair of intermediate members connecting the pair of first outer shells 16A and 16A. Second outer shell) 16B, 16B, and so on. As shown in FIG. 6, each intermediate member 16B is located at the center in the width direction of the seat body 41, and is arranged on the front side and the rear side of the seat body 41 in the Y direction, respectively, as shown in FIG.

The intermediate material 16B is resin-molded, for example, obtained by vacuum forming. The intermediate member 16B has a shape continuous with the first outer shells 16A and 16A located on both sides in the X direction, and has a concave three-dimensional shape covering the lower peripheral edge of the panel support frame 48 of the support member 43.

The intermediate member 16B has a shape continuous with the first outer shells 16A and 16A located on both sides in the width direction (X direction).

The pair of first outer shells 16A and 16A and the pair of intermediate members 16B and 16B arranged between them form a lower frame (outer shell 44) over the entire circumference of the lower structure 141.

In this way, a large outer shell 44 can be constructed by using not only the pair of first outer shells 16A and 16A but also the pair of intermediate members 16B arranged between them. Therefore, the sofa 200 can be processed into a sofa 200 having a long length in the width direction. Since the intermediate material 16B is also formed from a resin molded product in the same manner as the first outer shell 16A, it can be easily manufactured in a short time without requiring skill. As described above, it is possible to realize a desired design regardless of the size of the sofa, and to provide the seat structure 210 of the sofa 200 which has both quality and productivity while suppressing the manufacturing cost. Here, the seat structure 210 means the seat body 41 of the sofa 200 and the structure below the seat body 41. That is, it means a structure including a sofa seat body 41, four legs 13, and four grounding portions 14.

Note that the intermediate material 16B may be composed of a plurality of resin molded products.

Although each embodiment of the present invention has been described above, each configuration and a combination thereof in each embodiment are examples, and the configuration can be added, omitted, replaced, and other changes within the scope of the present invention. is there. Further, the present invention is not limited to the above embodiments.

For example, in the above-described embodiment, the outer shell 16 is composed of two C-shaped first outer shells 16A and 16A, but the present invention is not limited to this, and for example, four L-shaped outer shells (hereinafter, L-shaped outer shells). It may be configured by). For example, an L-shaped outer shell may be arranged at each corner of the sofa 100. These four L-shaped outer shells may be arranged continuously in the circumferential direction and may be arranged without gaps with each other.

In this way, the L-shaped outer shells arranged at the four corners of the sofa, which has a rectangular shape when viewed from above, make it possible to add designs to the front, rear, and both sides of the sofa in the Y direction. Can be widened.

Further, when the intermediate material is arranged between the adjacent L-shaped outer shells, the L-shaped outer shells arranged at each corner are connected by the intermediate material, and the adjacent L-shaped outer shells and the intermediate materials are connected to each other. May be arranged without a gap between them. As a result, the range of designs for large sofas can be expanded.

The sofas 100 and 200 of each of the above-described embodiments were configured to have four legs 13 respectively, but they can also be applied to sofas without legs 13. In this case, it is preferable to provide the ground contact portion 14 on the lower end side of the four corners of the seat body.

In each of the above-described embodiments, the sofa for two-seater and three-seater has been described, but the sofa is not limited to this, and a sofa for one-seater and four-seater or more may be used.

According to the present invention, it is possible to provide a sofa seat structure that suppresses manufacturing costs and has both high design and productivity.

11,41 ... Seat body, 14 ... Grounding part, 15,43 ... Support member, 16,44 ... Outer shell, 16A ... First outer shell, 16B ... Intermediate material (second outer shell), 17 ... Lower epidermis (skin), 27 ... upper epidermis (epidermis), 42 ... main body, 100, 200 ... sofa, 111, 141 ... lower structure, 112, 142 ... upper structure, T1, T2, T3 ... height

Claims (8)

1. A seat body and a grounding portion provided at the lower end of the seat body and supporting the seat body are provided.
   The seat body has a lower structure that constitutes the lower part of the seat body and is supported by the ground contact portion, and an upper structure that is laminated on the lower structure and constitutes the upper part of the seat body.
   The lower structure has a support member that supports the upper structure and an outer shell that covers the support member, and the outer shell is formed of a resin.
2. The outer shell
   In each of the width direction and the depth direction, the height dimension is smaller in the center than on both outer sides.
   The seat structure of the sofa according to claim 1.
3. It has an epidermis that covers the support member and the outer shell.
   The skin is fixed to the support member,
   The seat structure of the sofa according to claim 1.
4. The outer shell includes a pair of first outer shells arranged on both sides in the width direction of the seat body.
   It has a pair of second outer shells that are arranged without a gap between the pair of the first outer shells and that connect the pair of the first outer shells.
   The seat structure of the sofa according to claim 1.
5. It has an epidermis that covers the support member and the outer shell.
   The skin is fixed to the support member,
   The seat structure of the sofa according to claim 2.
6. The outer shell includes a pair of first outer shells arranged on both sides in the width direction of the seat body.
   It has a pair of second outer shells that are arranged without a gap between the pair of the first outer shells and that connect the pair of the first outer shells.
   The seat structure of the sofa according to claim 2.
7. The outer shell includes a pair of first outer shells arranged on both sides in the width direction of the seat body.
   It has a pair of second outer shells that are arranged without a gap between the pair of the first outer shells and that connect the pair of the first outer shells.
   The seat structure of the sofa according to claim 3.
8. The outer shell includes a pair of first outer shells arranged on both sides in the width direction of the seat body.
   It has a pair of second outer shells that are arranged without a gap between the pair of the first outer shells and that connect the pair of the first outer shells.
   The seat structure of the sofa according to claim 5.

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